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Rafael J. Wysocki f227c2f2d1 cpufreq: intel_pstate: Read global.no_turbo under READ_ONCE() 
[ Upstream commit 9558fae8ce ]

Because global.no_turbo is generally not read under intel_pstate_driver_lock
make store_no_turbo() use WRITE_ONCE() for updating it (this is the only
place at which it is updated except for the initialization) and make the
majority of places reading it use READ_ONCE().

Also remove redundant global.turbo_disabled checks from places that
depend on the 'true' value of global.no_turbo because it can only be
'true' if global.turbo_disabled is also 'true'.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Stable-dep-of: 350cbb5d2f ("cpufreq: intel_pstate: Check turbo_is_disabled() in store_no_turbo()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-09-09 18:54:24 +02:00
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README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.